package cn.com.longfuinfo.wx.util;
 
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import javax.imageio.ImageIO;
 
/*******************************************************************************
 * Description: 图片水印工具类 
 * Copyright: Copyright (c) 2011 
 * Company: Founder 
 * Project: CMS
 * 
 * @Author taoxg
 * @version 1.0
 * @See 
 * HISTORY 2011-9-27 taoxg create
 ******************************************************************************/
public class ImageUtil {
     
    // 水印透明度 
    private static float alpha = 0.8f;
    // 水印横向位置
    private static int positionWidth = 183;
    // 水印纵向位置
    private static int positionHeight = 183;
    // 水印文字字体
    private static Font font = new Font("宋体", Font.BOLD, 30);
    // 水印文字颜色
    private static Color color = Color.red;
    /**
     * 
     * @param alpha 
     *          水印透明度
     * @param positionWidth 
     *          水印横向位置
     * @param positionHeight 
     *          水印纵向位置
     * @param font 
     *          水印文字字体
     * @param color 
     *          水印文字颜色
     */
    public static void setImageMarkOptions(float alpha , int positionWidth , int positionHeight ,Font font,Color color){
        if(alpha!=0.0f)ImageUtil.alpha = alpha;
        if(positionWidth!=0)ImageUtil.positionWidth = positionWidth;
        if(positionHeight!=0)ImageUtil.positionHeight = positionHeight;
        if(font!=null)ImageUtil.font = font;
        if(color!=null)ImageUtil.color = color;
    }
     
    /**
     * 给图片添加水印图片
     * 
     * @param iconPath
     *            水印图片路径
     * @param srcImgPath
     *            源图片路径
     * @param targerPath
     *            目标图片路径
     */
    public static void markImageByIcon(Image icon, File srcImage,String targerPath) {
    	
        markImageByIcon(icon, srcImage, targerPath, null);
    }
 
    /**
     * 给图片添加水印图片、可设置水印图片旋转角度
     * 
     * @param iconPath
     *            水印图片路径
     * @param srcImgPath
     *            源图片路径
     * @param targerPath
     *            目标图片路径
     * @param degree
     *            水印图片旋转角度
     */
    public static void markImageByIcon(Image icon, File srcImage,String targerPath, Integer degree) {
    	OutputStream os = null;
        try {
            Image srcImg = ImageIO.read(srcImage);
            BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null),srcImg.getHeight(null), BufferedImage.TYPE_INT_RGB);
            // 1、得到画笔对象
            Graphics2D g = buffImg.createGraphics();
 
            // 2、设置对线段的锯齿状边缘处理
            g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,RenderingHints.VALUE_INTERPOLATION_BILINEAR);
            g.drawImage(srcImg.getScaledInstance(srcImg.getWidth(null), srcImg.getHeight(null), Image.SCALE_SMOOTH), 0, 0, null);
            // 3、设置水印旋转
            if (null != degree) {
                g.rotate(Math.toRadians(degree),(double) buffImg.getWidth() / 2, (double) buffImg.getHeight() / 2);
            }
 
            // 4、水印图片的路径 水印图片一般为gif或者png的，这样可设置透明度
//            ImageIcon imgIcon = new ImageIcon(iconPath)
            g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,alpha));
 
            // 6、水印图片的位置
            g.drawImage(icon, positionWidth, positionHeight, null);
            g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER));
            // 7、释放资源
            g.dispose();
             
            // 8、生成图片
            os = new FileOutputStream(targerPath);
            ImageIO.write(buffImg, "JPG", os);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (null != os)
                    os.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
 
    /**
     * 给图片添加水印文字
     * 
     * @param logoText 
     *          水印文字
     * @param srcImgPath
     *          源图片路径
     * @param targerPath
     *          目标图片路径
     */
    public static void markImageByText(String logoText, String srcImgPath,
            String targerPath) {
        markImageByText(logoText, srcImgPath, targerPath, null);
    }
 
    /**
     * 给图片添加水印文字、可设置水印文字的旋转角度
     * 
     * @param logoText
     * @param srcImgPath
     * @param targerPath
     * @param degree
     */
    public static void markImageByText(String logoText, String srcImgPath,
            String targerPath, Integer degree) {
         
        InputStream is = null;
        OutputStream os = null;
        try {
            // 1、源图片
            Image srcImg = ImageIO.read(new File(srcImgPath));
            BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null),srcImg.getHeight(null), BufferedImage.TYPE_INT_RGB);
 
            // 2、得到画笔对象
            Graphics2D g = buffImg.createGraphics();
            // 3、设置对线段的锯齿状边缘处理
            g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,RenderingHints.VALUE_INTERPOLATION_BILINEAR);
            g.drawImage(srcImg.getScaledInstance(srcImg.getWidth(null), srcImg.getHeight(null), Image.SCALE_SMOOTH), 0, 0, null);
            // 4、设置水印旋转
            if (null != degree) {
                g.rotate(Math.toRadians(degree),(double) buffImg.getWidth() / 2, (double) buffImg.getHeight() / 2);
            }
            // 5、设置水印文字颜色
            g.setColor(color);
            // 6、设置水印文字Font
            g.setFont(font);
            // 7、设置水印文字透明度
            g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,alpha));
            // 8、第一参数->设置的内容，后面两个参数->文字在图片上的坐标位置(x,y)
            g.drawString(logoText, positionWidth, positionHeight);
            // 9、释放资源
            g.dispose();
            // 10、生成图片
            os = new FileOutputStream(targerPath);
            ImageIO.write(buffImg, "JPG", os);
 
            System.out.println("图片完成添加水印文字");
             
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (null != is)
                    is.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
            try {
                if (null != os)
                    os.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
    
    /** *//** 
     * 缩放图像 
     * @param srcImage		 源图像文件 
     * @param width        缩放后的宽度
     * @param height 	         缩放后的高度
     */  
    public BufferedImage scale(File srcImage, int width, int height){  
    	BufferedImage tag = null;
    	try  
        {  
            BufferedImage src = ImageIO.read(srcImage); // 读入文件   
            Image image = src.getScaledInstance(width, height, Image.SCALE_SMOOTH);  
            tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);  
            Graphics2D g = tag.createGraphics(); 
            // 设置对线段的锯齿状边缘处理   
            g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,   
                    RenderingHints.VALUE_INTERPOLATION_BILINEAR);  
            g.drawImage(image, 0, 0, null); // 绘制缩小后的图  
            g.dispose(); 
        }  
        catch (IOException e){  
            e.printStackTrace();  
        }
        return tag;
    }  
     
//    public static void main(String [] args){
//        String srcImgPath = "C:/Users/Administrator/Desktop/post.png";  
//        String logoText = "[ I love Jing]";
//        String iconPath = "C:/Users/Administrator/Desktop/showqrcode.jpg";  
//         
//        String targerTextPath = "C:/Users/Administrator/Desktop/jing_text.jpg";  
//        String targerTextPath2 = "C:/Users/Administrator/Desktop/jing_text_rotate.jpg";
//         
//        String targerIconPath = "C:/Users/Administrator/Desktop/jing_icon.jpg";  
//        String targerIconPath2 = "C:/Users/Administrator/Desktop/jing_icon_rotate.jpg";
//         
//        System.out.println("给图片添加水印文字开始...");
//        // 给图片添加水印文字  
//        markImageByText(logoText, srcImgPath, targerTextPath);  
//        // 给图片添加水印文字,水印文字旋转-45  
//        markImageByText(logoText, srcImgPath, targerTextPath2, -45);  
//        System.out.println("给图片添加水印文字结束...");
//         
//        System.out.println("给图片添加水印图片开始...");
//        setImageMarkOptions(1.0f,160,343,null,null);
//        // 给图片添加水印图片  
//        markImageByIcon(iconPath, srcImgPath, targerIconPath);  
//        // 给图片添加水印图片,水印图片旋转-45  
//        markImageByIcon(iconPath, srcImgPath, targerIconPath2, -45); 
//        System.out.println("给图片添加水印图片结束...");
//    }
 
}